[miro]

Hello,

After unfrequent use of circular polarizers I discovered that my two Hoya CPL have some scratches at front side . At the same time I don’t have any scratches on all my lenses equipped with different brands of UV filters.

I have

1. Hoya 52mm HMC circular polarizer - green label

2. Hoya 77mm Pro1-Digital - blue label. I have some doubt about this filter /maybe fake/.



My question are

1. Where is located the polarizing film on Hoya filters?

a. front side of the glass

b. back side of the glass

c. between two glasses as B+W

2. Should I handle CPL filters with extra special care? /since I don’t have any scratches at my lenses and UV filters./

3. How durable are other brands of CPL. E.g. B+W or Helioplan?



Thanks in advance

Miro